On 29/09/2023 09:16, Uwe Kleine-König wrote:

etm4_platform_driver (which lives in ".data" contains a reference to etm4_remove_platform_dev(). So the latter must not be marked with __exit which results in the function being discarded for a build with CONFIG_CORESIGHT_SOURCE_ETM4X=y which in turn makes the remove pointer contain invalid data.

etm4x_amba_driver referencing etm4_remove_amba() has the same issue.

Drop the __exit annotations for the two affected functions and a third one that is called by the other two.

Makes sense to me, I can't see any other struct platform_driver callbacks marked with __init or __exit.

Reviewed-by: James Clark james.clark@arm.com

For reasons I don't understand this isn't catched by building with CONFIG_DEBUG_SECTION_MISMATCH=y.

Fixes: c23bc382ef0e ("coresight: etm4x: Refactor probing routine") Fixes: 5214b563588e ("coresight: etm4x: Add support for sysreg only devices") Signed-off-by: Uwe Kleine-König u.kleine-koenig@pengutronix.de

---

drivers/hwtracing/coresight/coresight-etm4x-core.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/hwtracing/coresight/coresight-etm4x-core.c b/drivers/hwtracing/coresight/coresight-etm4x-core.c index 77b0271ce6eb..34aee59dd147 100644 --- a/drivers/hwtracing/coresight/coresight-etm4x-core.c +++ b/drivers/hwtracing/coresight/coresight-etm4x-core.c @@ -2224,7 +2224,7 @@ static void clear_etmdrvdata(void *info) per_cpu(delayed_probe, cpu) = NULL; } -static void __exit etm4_remove_dev(struct etmv4_drvdata *drvdata) +static void etm4_remove_dev(struct etmv4_drvdata *drvdata) { bool had_delayed_probe; /* @@ -2253,7 +2253,7 @@ static void __exit etm4_remove_dev(struct etmv4_drvdata *drvdata) } } -static void __exit etm4_remove_amba(struct amba_device *adev) +static void etm4_remove_amba(struct amba_device *adev) { struct etmv4_drvdata *drvdata = dev_get_drvdata(&adev->dev); @@ -2261,7 +2261,7 @@ static void __exit etm4_remove_amba(struct amba_device *adev) etm4_remove_dev(drvdata); } -static int __exit etm4_remove_platform_dev(struct platform_device *pdev) +static int etm4_remove_platform_dev(struct platform_device *pdev) { struct etmv4_drvdata *drvdata = dev_get_drvdata(&pdev->dev);

base-commit: 0bb80ecc33a8fb5a682236443c1e740d5c917d1d